Valve



L. F. MOODY Sept. 29, 1931.

VALVE Filed Nov. 1 1926 Patented Sept. 29, 1931 PATENT OFFICE LEWISI.MOODY, OF PHILADELPHIA, PENNSYLVANIA VALVE Application filed November17, 1926. Serial No. 148,810.

This invention relates generally to valve mechanisms, and moreparticularly to a valve mechanism adapted for control of fluid inrelatively large hydraulic pipe lines, and an object of my invention isto' provide an improved arrangement of valve parts and operating meanstherefor, whereby fluid flow through the valve may be efficiently andpositively controlled combined with other desirable operating andstructural features such as will be more apparent to those skilled inthis art.

More specific objects are to provide a clear passageway in that part ofthe valve Where relatively high velocity flow ishad, and to provide,also, means whereby an improved fluid pressure control of the valve maybe had.

Other objects and advantages thereof will be seen from the followingdescription of the accompanying drawing in which the figure is alongitudinal sectional view through the valve mechanism interposedbetween up and downstream pipes of a fluid conduit.

In the illustrative embodiment of my invention, I have shown a plungertype of valve mechanism comprising an outer casing adapted to be securedthrough suitable flanges to an upstream pipe C and a downstream pipe C,it being noted that the valve receives fluid from the upstream pipe andcontrols its discharge into the downstream pipe C, this latter pipebeing preferably of somewhat smaller diameter than the upstream pipethereby creating a region of lower pressure in the downstream pipeadjacent the valve than in the upstream pipe. By this arrangement it isossible to obtain 40 effective and relatively hig operating pressurefrom the upstream pipe and discharge the operating fluid into the re ionof lower pressure in the downstream pipe, there bein g the furtheradvantage that the plunger 15 to be described is operating in thisregion of relatively low pressure Said casing supports, through suitableribs R, an interior casing or fixed valve element 26 spaced from theouter casing 25 to provide a relatively it) smooth annular fluidpassageway P between the inner and outer casings. This inner casing hasa conical head 26. The forward part 27 is supported by ribs 28 havingguiding surfaces 29 for the plunger valve 30 which is telescopicallyreceived within the inner casing 26. The nosepiece of the. plunger andthe rearwardly extending annular portion 31 are preferably integral andadapted to be moved forward for engagement with a seat 32 formed in theouter casing 25. To permit the valve to be of minimum diameter, as byhaving the plunger provided with the plain annular portion 31, and stillallow an efficient, simple and economical means of fluid operation,there is provided a piston or partition 33 attached to and movable withthe plunger 30. This attachment can be made by any suitable means, suchas bolts or the like. Inward movement of the plunger is preferably 7limited by a suitable flange 34 carried on the inner casing 26. Astationary diaphragm 35 is secured to a fixed tubular member or rod 36extending through a suitable substantially leak-proof opening in thepiston 33, and is secured to the rear portion of the interior casing 26.The piston 33 and diaphragm 35 in cooperation with the plunger and innervalve casing 26 form the three tandem chambers D, E and F.

There are thus formed closing chambers D and F and an opening chamber E.Fluid flow to or from either one of these chambers may be had by pipes37, 38 and 39, the last two having communication with chambers D and Ethrough passages 40 and 41 formed in the rod 36. The passage 41 extendsentirely through the rod, while the passage 40 communicates with thechamber E through the radial port 17 Closing movement of the plunger asit nears its seat is graduall retarded due to port 17 communicating withan annular groove in the rod 36 whereby the hub of piston 33 willoverride this annular groove thereby gradually throttling fluiddischarge into port 17. Under certain conditions, the pressure inchamber D might be suflicient to effect closure. of the valve, but underother conditions, a total closing force greater than that produced bypressure in chamber D may be necessary, in which case, pressure may besupplied through pipe 37 to chamber F.

Any suitable valve mechanism may be used for controlling the operatingfluid to the various operating chambers and the pipes leading to theseoperatingchambers can be provided with a suitable four-way valve, orother type, depending upon the operating conditions, such as possiblyreceiving the actuating fluid from the upstream pipe, or from anexternal source, and of either exhausting the discharge pressure toatmosphere, or to the region of low pressure in the downstream pipe.

Thus it is seen that my improved arrangement not only provides a clearpassage- Way adjacent the outlet whereby the velocity of flow may berelatively high, but also the nose piece is made to form an operatingchamber so that relatively simple fluid operating control may be used.In order that the plunger nose may be provided with a fluid chamberwhich serves the function of an operating or pressure chamber it isnecessary that the nose be closed or otherwise arranged to prevent anysubstantial uncontrolled communication between the nose chamber and thedownstream pipe. Such an arrangement permits control of the relativepressures in all of the chambers.

I claim:

1. A fluid receiving and controlling valve, including a valve bodyarranged to be con nected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the'opposite end, a valve seat arranged in said body, amova ble plunger adapted for cooperation with said seat, a fixed valveelement within said body and having a conical head at one end andadapted to telescopically receive said movable plunger at its oppositeend, said valve element providing an annular waterway within said bod, apiston movable with said plunger, a xed tubular member within said valveelement, a fixed diaphragm carried by the end of said tubular member andarranged to fit within said plunger, said valve member, plunger, pistonand diaphragm providing three tandem pressure chambers adapted toreceive pressure fluid from said conduit, and means for controlling therelative pressures in all of said chambers.

2. 'A fluid receiving and controlling valve, including a valve bodyhaving an inlet and an outlet of smaller diameter than the inlet wherebya higher pressure exists in the inlet than at the outlet during flow offluid therethrough, said valve being arranged to be connected to a fluidconveying conduit and to receive flowing fluid at one end and to control its discharge from the opposite end, a valve seat arranged in saidbody, a movable plunger adapted for cooperation with said seat, a fixedvalve element, within said body, having a conical head at one end andadapted to telescopically receive said movable plunger at its oppositeend, said valve element providing an annular waterway within said body,a piston movable with said plunger, a fixed tubular member within saidvalve element, a fixed diaphragm carried by the end of said tubularmember and arranged to fit within said plunger, said valve member,plunger, piston and diaphragm providing three tandem pressure chambersadapted to receive pressure fluid from said conduit, means whereby fluidpressure may be supplied from the inlet side of said valve mechanism toall of said chambers as required in accordance with opening or closingof the valye, and means whereby during valve operation fluid pressuremay be discharged from at least one of said chambers to the outlet sideof said valve mechanism where the lower pressure exists.

3. A fluid receiving and controlling valve, including a valve bodyarranged to be connected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the opposite end, a valve seat arranged in said body, amovable plunger having a closed nose and adapted for cooperation withsaid seat, a fixed valve element within said body and having a conicalhead at one end and adapted to telescopically receive said movableplunger at its opposite end, said valve element providing an annularwaterway within said body, a piston movable with said plunger, a fixedtubular member within said valve 'element, a fixed diaphragm carried bythe end of said tubular member and arranged to fit within said plunger,said valve member, plunger, piston and diaphragm providing three tandempressure chambers adapted to receive pres sure fluid from said conduit,and means for controlling fluid from the exterior of said valvemechanism in at least two of the chambers thereof.

4. A fluid receiving and controlling valve, including a valve bodyarranged to be connected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the opposite end, a valve seat arranged in said body, amovable plunger adapted for cooperation with said seat, a fixed valveelement, within said body, having a conical head at one end and adaptedto telescopically receive said movable plunger at its opposite end, saidvalve element providing an annular Waterway within said body, a pistonmovable with said plunger, a fixed tubular member within said valveelement, a fixed diaphragm carried by the end of said tubular member andarranged to fit within dem pressure chambers adapted to receive.

pressure fluid from said conduit, and means for controlling the relativepressures in all of said chambers,- said pressure controlling meansincluding control passages connectable with said conduit and extendingacross said annular waterway from the exterior of said valve mechanismto the tandem chambers therein.

5. A fluid receiving and controlling valve, including a valve bodyarranged to be connected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the opposite end, a valve seat arranged in' said body, amovable plunger having a closed nose and adapted for cooperation withsaid seat, a fixed valve element, within said body, having a conicalhead at one end .and adapted to telescopically receive said movableplunger at its opposite end, said valve element providing an annularwaterway within said body, a piston movable with said plunger, a fixedtubular member within said valve element, a fixed diaphragm carried bythe end of said tubular member and arranged to fit within said plunger,said valve member, plunger, piston and diaphragm providing three tandempressure chambers adapted to receive pressure fluid from said conduit,and means for supplying fluid from the conduit to a plurality of saidchambers and for positively effecting discharge of fluid from the otherof said chambers.

6. A fluid receiving and controlling valve, including a valve bodyarranged to be connected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the opposite end, a valve seat arranged in said body, amovable plunger having a closed nose and adapted for cooperation withsaid seat, a fixed valve element within said body and having a conicalhead at one end and adapted to telescopically receive said movableplunger at its opposite end, said valve element providing an annularwaterway within said body, a piston movable with said plunger, a fixedtubular member within said valve element, a fixed diaphragm carried bythe end of said tubular member and arranged to fit within said plunger,said valve member, plunger, piston and diaphragm providing three tandempressure chambers adapted to receive pressure fluid from said conduit,and means for controlling the relative pressures in all three chambers,including means. for supplying fluid from the upstream side of the fluidconveying conduit to two of said tandem chambers one of which is in theupstream end of the valve mechanism and the otherof which is in thedownstream nose portion of the plunger and for discharging fluid fromthe intermediate chamber to a point of lower pressure than exism in theupstream side of the plunger.

, 7. A fluid receiving and controlling valve, including a valve bodyarranged to be connected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the opposite end, a valve seat arranged in said body, amovable plunger, adapted for cooperation with said seat, a fixed valveelement within said body and having a conical head at one end andadapted to telescopically receive said movable plunger at its oppositeend, said valve element providing an annular waterway within said body,a piston movable with said plunger, a fixed tubular member within saidvalve element, a fixed diaphragm carried by the end of said tubularmember and arranged to fit within said plunger thereby providing achamber in the nose of the plunger, sald valve member, plunger, pistonand diaphragm providing three tandem pressure chambers, one of which issaid nose chamber, adapted to receive pressure fluid from said conduit,and means for controlling the relative pressures in all of saidchambers, said pressure convalve being arranged to receive flowingfluidat one end and to control its discharge from the opposite end, avalve seat arranged in said body, a movable plunger having a closed noseand adapted for cooperation with said seat, a fixed valve element withinsaid body and having a conical head at one end and adapted totelescopically receive said movable plunger at its opposite end, saidvalve element providing an annular waterway within said bod a pistonmovable with said plunger, a xed tubular member with- ,in said valveelement, a fixed diaphragm carried by the end of said tubular member andarranged to fit within said plunger, said valve member, plunger, pistonand diaphragm providing three tandem pressure chambers adapted toreceive r'essure fluid from said conduit, and means for controlling therelative pressures in all three chambers, including means for throttlingthe flow of fluid relative to one of the chambers b motion of theplunger automatically when it approaches its closing position.

9. A fluid receiving and controlling valve, including a valve bodyarranged to be connected to a fluid conveying conduit, said valve beingarranged to receive flowing fluid at one end and to control itsdischarge from the opposite end, a valve seat arranged in said body, amovable plunger having a closed nose and adapted for cooperation withsaid seat, a fixed valve element Within said body and having a conicalhead at one end and adapted to telescopically receive said movableplunger at its opposite end, said valve element providing an annularWaterway Within said body, a piston movable with said plunger, a fixedtubular member within said valve element, a fixed diaphragm carried bythe end of said tubular member and arranged to fit Within said plunger,said fixed tubular member being disposed co-axially of the plunger andextending through said piston so as to permit rotation of said plungerin case of any tendency therefor, said valve member, plunger, piston anddiaphragm providing three tandem pressure chambers adapted to receivepressure fluid from said conduit, and means for controlling the relativepressures in all of said chambers.

LEWIS F. MOODY.

